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Checking variable with specific string and stripping number from it.

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Top Forums Shell Programming and Scripting Checking variable with specific string and stripping number from it.
# 8  
Old 10-17-2012
Code:
#/bin/sh
if [ -z "$test4" ]
then
   echo test4 is empty
else
   echo test4 is "$test4"
fi
test4=32m
test4=${test4%m}
if [ -z "$test4" ]
then
   echo test4 is empty
else
   echo test4 is "$test4"
fi

# 9  
Old 10-17-2012
It does not help.
Loop is not working properly with -z option.
# 10  
Old 10-17-2012
Code:
#/bin/sh
if [ "$test4" == "" ]
then
   echo test4 is empty
else
   echo test4 is "$test4"
fi
test4=32m
test4=${test4%m}
if [ "$test4" == "" ]
then
   echo test4 is empty
else
   echo test4 is "$test4"
fi

# 11  
Old 10-17-2012
First part is good for comparing with empty value. Thx

Now I need to add the loop in which it should compare whether test4 ends "h" or "s", if it is then ignore.

Otherwise it should use test4 with $(test4%m).
# 12  
Old 10-17-2012
${test4%m} will remove the m at the end leaving the h or s alone.
# 13  
Old 10-17-2012
I agree the solution with echo removes "m" and keeps values whihc ends in "s" or "h".

My ultimate goal is to get value in numeric for "m".

But my main problem is I am not sure what I am going to get in test4.

So I have to compare whether it is "m" or "s" or "h"

Once it is with "m" then I can use echo command and go forward.

That's why I have to do compare with empty space, h or s.
# 14  
Old 10-17-2012
Another example:
Code:
#/bin/sh
typeset -R1 lchar
test4=32m
lchar=$test4
echo test4 is $test4
echo lchar is $lchar
case $lchar in
  m)
    echo lchar is m
  ;;
  h|s)
    echo lchar is h or s
  ;;
  "")
    echo lchar is empty? how can this be?
  ;;
esac
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